—Who taught ______ English last year?—Nobody. She taught herself.A. him B. her C. you
----How terrible the air is!Yes,if there are ___trees, there will be ___air pollution in our city.
—Will you buy the white watch or the red one ?----I’ll take_____.One is for my mother and the other is for my sister.
—What is he going to ______ when he ______ up?—He’s going to be a doctor.
I had _____useful umbrella when it rained.
—Jim, remember to return this book by Friday.— .